CN103062970A - High performance refrigerator having insulated evaporator cover - Google Patents
High performance refrigerator having insulated evaporator cover Download PDFInfo
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- CN103062970A CN103062970A CN2012104009557A CN201210400955A CN103062970A CN 103062970 A CN103062970 A CN 103062970A CN 2012104009557 A CN2012104009557 A CN 2012104009557A CN 201210400955 A CN201210400955 A CN 201210400955A CN 103062970 A CN103062970 A CN 103062970A
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- evaporimeter
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- air door
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- inner space
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- 238000010257 thawing Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 35
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- 238000009413 insulation Methods 0.000 claims description 14
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/02—Devices using other cold materials; Devices using cold-storage bodies using ice, e.g. ice-boxes
- F25D3/06—Movable containers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/045—Air flow control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/067—Evaporator fan units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
- F25D23/065—Details
- F25D23/068—Arrangements for circulating fluids through the insulating material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
A high performance refrigerator (10) includes a cabinet (14) with a refrigerated interior (18), an insulating cover (70) separating a portion of the cabinet (14) from the refrigerated interior (18), and a refrigeration fluid circuit (20) having an evaporator (30) located within the portion of the cabinet (14) separated by the insulating cover from the refrigerated interior. The refrigerator (10) also includes a controller (50) that commands the refrigerator(10) to perform a defrosting cycle when an evaporator coil (112) requires defrosting. This defrosting cycle includes closing dampers (66, 68) in the insulating cover (70) during the defrosting of the evaporator coil (112), thereby keeping the refrigerated interior (18) thermally isolated from the evaporator (30) during the defrost cycle. The controller (50) is also operable to stop operation of a defrost heater (114) when the evaporator (30) reaches a first target temperature above the freezing point of water, and to re-open the dampers (66, 68) when the evaporator (30) reaches a second target temperature above the freezing point of water.
Description
The cross reference of related application
The application advocates to enjoy the U.S. Provisional Patent Application No.61/548 that submitted on October 19th, 2011, and 795(is undetermined) priority, being disclosed in this and being integrated into herein with the form of quoting of this patent application.
Invention field
Present invention relates in general to refrigerator or refrigerator and relate more specifically to refrigeration system for high-performance blood bank refrigerator or plasma freezing machine.
Background technology
The refrigeration system that is used for being called " high-performance refrigerator " such laboratory refrigerator and refrigerator is known, and it is used to for example its internal storage space is cooled to such as approximately-30 ° C or lower relatively low temperature.These high-performance refrigerators are used to storage of blood and/or blood plasma in one example.
Known such refrigeration system comprises the single loop that makes refrigerant circulation.This system is delivered to surrounding environment from cold-producing medium by condenser with energy (that is, heat), and this system is delivered to cold-producing medium from the space (for example cabinet inner space) that is cooled by evaporimeter with heat energy.Cold-producing medium is selected, with evaporation under close to the selected temperature of the desired temperature in the space that is cooled with condense, thereby, so that the space that refrigeration system can keep being cooled in running is near that selected temperature.
A common problem of known refrigeration system is, if any moisture is arranged in the space that is cooled, evaporimeter just trend towards producing and the accumulation frost along outer surface around pipe.If the accumulation of enough frosts occurs, the evaporimeter ability that removes heat from the space that is cooled is adversely affected so.Therefore, known refrigeration system needs defrost cycle, and wherein, thereby evaporimeter is heated around pipe frost is removed.This defrost cycle can be manually to defrost or automatic defrosting, but because a variety of causes, this defrost cycle of two types all is undesirable.
In manual defrost cycle, the storewide that is stored in the cabinet all is removed, and the space that is cooled is exposed in the external environment, with heating fumigators around pipe with melt frost.This circulation is undesirable, because the article that are stored in the cabinet needed to be stored in the alternative refrigerator in the time period of defrost cycle, and also because melting process can produce a large amount of water that need to remove from cabinet.In the automatic defrosting circulation, evaporimeter is promptly heated by local heating unit or thermal current around pipe, and to remove frost, this frost is collected and is transported to the outside in the space that is cooled by tank.The space that is cooled is inevitably bearing temperature fluctuation in this defrost cycle process, and this can damage the article that are stored in the cabinet.
Therefore, for refrigerator, the demand that fully temperature fluctuation in the space that is cooled is minimized or eliminates is arranged in the defrost cycle process.
Summary of the invention
In one embodiment, refrigerator comprises: have the cabinet of the inner space that is cooled and be used for the cryogenic fluid loop of circulating refrigerant.Described cryogenic fluid loop comprises: compressor, condenser, expansion gear and evaporimeter, described evaporimeter is positioned at cabinet.Described evaporimeter comprises that evaporimeter is around managing, producing by evaporator fan and the defroster heating of evaporimeter around the air stream of pipe.Described refrigerator also comprises heat shield, and described heat shield separates the part of holding described evaporimeter of cabinet with the inner space that is cooled.Described heat shield comprises at least one air door, and described at least one air door can be opened, and cycles through evaporimeter to allow air from the inner space that is cooled.
Described refrigerator also comprises controller, and described controller can order described refrigerator to carry out the series of steps that limits defrost cycle when pipe needs defrosting at described evaporimeter.This a series of step comprises: stop the operation of described compressor and described evaporator fan; Close described at least one air door, so that described evaporimeter and the described inner space heat that is cooled are isolated; And the operation that starts described defroster heating.The described inner space that is cooled keeps in the running of described defroster heating and the isolation of described evaporimeter heat.
On the one hand, refrigerator also comprises the temperature sensor for the temperature of surveying evaporimeter.Controller is as follows operation in defrost process: when temperature sensor detected evaporimeter and reached the first object temperature of the freezing point that is higher than water, defroster heating stopped.Any remaining water from evaporimeter behind pipe drippage, compressor start.When temperature sensor detected evaporimeter and reached the second target temperature of the freezing point that is lower than water, described at least one air door was opened and evaporator fan starts.In one example, the first object temperature is about 10 ° of C, and the second target temperature is about-25 ° of C.Controller also can be carried out as the defrost cycle step that the defrost cycle of adaptive capacity is arranged, and this has the defrost cycle of adaptive capacity to comprise according to the time interval between a plurality of operational factors change defrost cycle and the length of defrost cycle.
In another embodiment of the present invention, provide a kind of method that operates refrigerator, described refrigerator comprises: the cabinet with the inner space that is cooled; The cryogenic fluid loop, described cryogenic fluid loop comprises compressor, condenser and evaporimeter; And heat shield, described heat shield has at least one air door, and is configured to described evaporimeter and the inner space that is cooled are separated.Described method comprises: stop the operation of described compressor and described evaporator fan.Close described at least one air door, so that described evaporimeter and the described inner space heat that is cooled are isolated.Start the operation of described defroster heating, to remove moisture from evaporimeter around pipe.The described inner space that is cooled keeps in the running of described defroster heating and the isolation of described evaporimeter heat.
In another embodiment, provide a kind of method that operates refrigerator, described refrigerator comprises: the cabinet with the inner space that is cooled; The cryogenic fluid loop, described cryogenic fluid loop comprises compressor, condenser and evaporimeter; And heat shield, described heat shield has at least one air door, and is configured to described evaporimeter and the inner space that is cooled are separated.Described method comprises: start the operation of described defroster heating when described at least one air door is closed.When described evaporimeter has reached the first object temperature of the freezing point that is higher than water, stop the operation of defroster heating and start the operation of described compressor.When described evaporimeter has reached the second target temperature of the freezing point that is lower than water, open described at least one air door and start the operation of described evaporator fan.
Description of drawings
The accompanying drawing that is comprised and form the part of this specification by this specification shows embodiments of the invention, and with above general description of the present invention and the detailed description one to embodiment that hereinafter provides are used from explanation principle of the present invention.
Fig. 1 is the perspective view according to the refrigerator that comprises heat shield of an exemplary embodiment.
Fig. 2 is the schematic diagram in the employed cryogenic fluid of the refrigerator of Fig. 1 loop.
Fig. 3 is the perspective view of the employed heat shield of the refrigerator of Fig. 1 (showing with dotted line) and air door.
Fig. 4 is the perspective view of the employed evaporimeter of refrigerator of Fig. 1, and wherein, some side plates are shown as dotted line, to show inner member.
Fig. 5 is the sectional view of the refrigerator of Fig. 1, and wherein, air door is in the closed position.
Fig. 6 is the sectional view of the refrigerator of Fig. 5, and wherein, air door is shown in an open position.
Fig. 7 is the schematic diagram of the employed controller of the refrigerator of Fig. 1 and air door driving element.
Fig. 8 is the indicative flowchart of showing the running process of the controller relevant with the refrigerator of Fig. 1.
The specific embodiment
As shown in drawings, particularly as shown in Figure 1, show exemplary high-performance refrigerator 10 according to an embodiment of the invention.Although term " high-performance refrigerator " and " refrigerator " are used in entire description, should be understood that the cooling device of any type is contained in the present invention, comprise the refrigerator with freezer unit.The refrigerator of Fig. 1 comprises the cabinet 12 that for example need to be cooled to approximately the article of-30 ° of C or lower temperature for storage.Cabinet 12 comprises the cabinet shell 14 that limits the essentially rectangular cross section and provides to the door 16 of the path of the inner space 18 of cabinet 12.Cabinet 12 supports and jointly limits single-stage cryogenic fluid loop 20(Fig. 2) one or more parts, this cryogenic fluid loop 20 interacts aspect thermodynamics with air in the cabinet 12, to cool off the inner space 18 of cabinet 12.In this respect, the cryogenic fluid loop 20 that the below is described in further detail and the air that warms in the inner space 18 interact and cool off this air, to keep the chilling temperature of expectation in cabinet 12.
With reference to figure 2, the details in exemplary cryogenic fluid loop 20 is illustrated.Cryogenic fluid loop 20 comprises successively: compressor 22, condenser 24, filter/drying device 26, expansion gear 28, evaporimeter 30 and suction/accumulation device 32.In these elements in cryogenic fluid loop 20 each is by being configured to make pipeline or pipeline 34 through cold-producing medium 36 circulations in cryogenic fluid loop 20 to be connected.A plurality of sensor S
1To S
5Be provided in the different conditions of a plurality of location sensing fluid circuits 20 in the fluid circuit 20 and/or the characteristic of cold-producing medium (illustrating by arrow 36).These sensors S
1To S
5In each be operably connected to can be by the controller 50 of control interface 52 access, this controller 50 allows the operation of control fluid circuits 20.Should be understood that, also can provide than in the exemplary embodiment of fluid circuit 20, show more or sensor still less.
Cold-producing medium 36 enters compressor 22 with evaporating state and be compressed into the gas of the temperature with higher pressure and Geng Gao in compressor 22.The fluid circuit 20 of this exemplary embodiment also comprises the lubricating oil loop 54 for lubricate compressors 22.Particularly, lubricating oil loop 54 comprises: the lubricating oil separation device 56 that is communicated with pipeline 34 fluids in compressor 22 downstreams and the lubricating oil return line 58 of lubricating oil being guided back compressor 22.Should be understood that lubricating oil loop 54 can be omitted in some embodiment of fluid circuit 20.
When leaving compressor 22, the cold-producing medium 36 that is evaporated advances to condenser 24.Fan 60 guiding outside airs by control interface 52 controls pass condenser 24 and pass through filter 62, in order to promote the transmission of heat from cold-producing medium 36 to surrounding environment.Air Flow by condenser 24 is illustrated by arrow in Fig. 2.As the result that this heat transmits, cold-producing medium 36 is in condenser 24 interior condensations.Liquid phase refrigerant is delivered in the expansion gear 28 by filter/drying device 26 subsequently.In this embodiment, expansion gear 28 is capillary forms, yet what can expect is that it can alternatively take another kind of form, such as but not limited to the expansion valve (not shown).Expansion gear 28 causes the pressure of cold-producing medium 36 to descend when cold-producing medium 36 soon enters evaporimeter 30.
In evaporimeter 30, cold-producing medium 36 receives heat in space 18 by a plurality of evaporimeters internally around pipe (not shown in Fig. 2).When the first and second air doors 66,68 were opened, the evaporator fan 64 of being controlled by control interface 52 impelled air to flow through evaporimeter around pipe from the inner space 18 of cabinet 12.The first and second air doors 66,68 are also by control interface 52 controls.The first and second air doors 66,68 control are further described below with reference to Fig. 8.By means of the pressure that is lowered with from the heat transmission of cabinet 12, cold-producing medium 36 is in evaporimeter 30 interior evaporations.The cold-producing medium 36 that is evaporated is guided to suction/accumulation device 32 subsequently.Suction/accumulation device 32 is delivered to compressor 22 with the cold-producing medium 36 of gaseous form, also accumulate simultaneously liquid form cold-producing medium 36 excessive part and with controlled speed it is supplied with compressor 22.
The cold-producing medium 36 that is used for cryogenic fluid loop 20 can be selected based on a plurality of factors (comprising expection running temperature in the cabinet 12 and boiling point and other characteristic of cold-producing medium 36).For example, in the refrigerator of the expection cabinet temperature with about-30 ° of C, the exemplary cold-producing medium 36 that is suitable for the embodiment of current description comprises the cold-producing medium that is called R404A on the market.In addition, in certain embodiments, cold-producing medium 36 can make up with lubricating oil, so that compressor 22 is lubricated.For example but without limitation, cold-producing medium 36 can make up with Mobil EAL Arctic 32 lubricating oil.Should be understood that the accurate layout of the parts of showing in the drawings only is illustrative rather than restrictive.
With reference to figure 3-6, especially Fig. 3, refrigerator 10 comprises heat shield 70, and this heat shield 70 is separated into evaporimeter section 72 and the section 74 that is cooled with the inner space 18 of cabinet 12.Heat shield 70 is connected to the roof 76, the sidewall 78(that jointly limit cabinet shell 14 and comprises rear wall 78) and/or diapire 80 in one or more.More specifically, heat shield 70 is connected to roof 76 and the sidewall 78 of cabinet shell 14, thereby, evaporimeter section 72 is isolated with the heat energy heat in the inner space 18, because heat energy can be in the 18 interior risings of the inner space of cabinet 12.Heat shield 70 among the embodiment that shows comprises: the horizontal plate part 84 from the roof 76 of cabinet shell 14 to the vertical plate part 82 of downward-extension and extension between the sidewall 78 of vertical plate part 82 and cabinet shell 14.Vertical plate part 82 and horizontal plate part 84 are by one or more thermal insulation boards, such as vacuum insulation panel 86 formation of hollow, as shown in Figure 3.Should be understood that the thermal insulation board of other type also can use in other embodiments of the invention, the thermal insulation board of other type includes but not limited to the thermal insulation board based on foam.
As shown in Figure 3, evaporimeter section 72 is defined as the space of essentially rectangular shape by vertical plate part 82, horizontal plate part 84, sidewall 78 and roof 76.Evaporimeter 30 is installed in the demarcation strip 88, and this demarcation strip 88 roughly is centrally located in the evaporimeter section 72, in order to evaporimeter section 72 is separated into entrance side 90 and outlet side 92.In this embodiment, demarcation strip 88 is another vacuum insulation panels or based on the thermal insulation board of foam, yet should be understood that the demarcation strip of other type also can be used in other embodiments.The horizontal plate part 82 of heat shield 70 comprises: be positioned at the ingate 94 on the entrance side 90 of demarcation strip 88 and be positioned at outlet opening 96 on the outlet side 92 of demarcation strip 88.The first air door 66 comprises the thermal insulation board that can be rotated to open or close by the air-flow of the ingate 94 between the inner space that is cooled 18 of entrance side 90 and cabinet 12.Similarly, the second air door 68 comprises the thermal insulation board that can be rotated to open or close by the air-flow of the outlet opening 96 between the inner space that is cooled 18 of outlet side 92 and cabinet 12.Therefore, can operate the first and second air doors 66,68, in order to can allow air-flow to pass through evaporimeter 30.
Also as shown in Figure 3, the first and second air doors 66,68 operationally are connected to air door driving mechanism 100, such as corresponding the first and second servomotors 102, the 104 and first and second driving shafts 106,108.The control of air door driving mechanism 100 and operation further are described in detail with reference to following Fig. 7.It will be appreciated that the first and second driving shafts 106,108 can be connected by traditional drive link mechanism (not shown) in certain embodiments, thereby so that only need single servomotor just can open and close the first and second air doors 66,68.In this respect, the first and second air doors 66,68 side by side are opened (perhaps closing) usually, thereby allow air-flow can pass through evaporimeter section 72 and evaporimeter 30.
Forward Fig. 4 to, evaporimeter 30 is further shown in detail.For this reason, evaporimeter 30 comprises the encirclement evaporimeter around the evaporator shell 110 of pipe 112, and this evaporimeter extends with serpentine fashion on the width of evaporimeter 30 around pipe 112.The pipeline 34 that evaporimeter operationally is connected to cryogenic fluid loop 20 around pipe 112, this pipeline 34 is transported to evaporimeter with liquid phase refrigerant and removes remaining liquid phase refrigerant that be evaporated and any around pipe 112 and from evaporimeter around pipe 112.Evaporator fan 64 is mounted along entrance side 90 places of evaporator shell 110 in evaporimeter section 72, in order to make air stream pervaporation device shell 110 and flow through evaporimeter around pipe 112.Flowing through evaporimeter after pipe 112, cooled air leaves evaporator shell 110 and enters the outlet side 92 of evaporimeter section 72.
With reference to figure 5 and 6, refrigerator 10 also comprises the upper compartment 120 of roof 76 tops that are positioned at cabinet shell 14.Upper compartment 120 is held other element (for example, compressor 22, condenser 24 etc.) in the cryogenic fluid loop 20 except evaporimeter 30, thereby, from the inner space 18 of cabinet 12, remove parts that major part takes up room or the generation heat.These other elements that are arranged in upper compartment 120 are not illustrated at Fig. 5 and 6, yet they are schematically shown in Fig. 2.The pipeline 34 that is used for cold-producing medium 36 extends through roof 76, with refrigerant conveying between the evaporimeter 30 in the parts in upper compartment 120 and the cabinet 12.
Fig. 5 and 6 also shows two running statuses of refrigerator 10.More specifically, in Fig. 5, the first and second air doors 66,68 are closed, thereby with evaporimeter section 72 and the section's 74 heat isolation that are cooled.Evaporator fan 64 leaves unused when the first and second air doors 66,68 are closed usually, and 72 neutralizations circulate out from evaporimeter section 72 because air can't be recycled to evaporimeter section.Defroster heating 114 only is operated in this running status of refrigerator 10, thereby, so that whole heat energy of producing of defroster heating 114 are retained in the evaporimeter section 72 in defrost cycle or defrost process basically.For this reason, the temperature big ups and downs in the section that is cooled 74 of inner space 18 are lowered or eliminate in the defrost cycle process.On the contrary, the first and second air doors 66,68 are opened in Fig. 6, thereby so that can flow through evaporimeter 30 and evaporimeter around pipe 112, to be used for cooling from the air of the section of being cooled 74.The air stream that is activated by evaporator fan 64 is schematically shown by arrow 122 in Fig. 6.Therefore, in this running status of refrigerator 10, relatively hot air enters evaporimeter section 72 by ingate 94, and relatively cold air leaves evaporimeter section 72 by outlet opening 96.
Fig. 7 schematically shows for the first and second air doors 66,68 control and actuating mechanism.More specifically, the first and second air doors 66,68 are connected to air door driving mechanism 100, and this air door driving mechanism 100 is connected to controller 50.That controller 50 can comprise that at least one is connected to the CPU of memory (" CPU ") as to understand in the art.Each CPU usually uses and is disposed in the circuit arrangement of one or more physical integrations or the circuit logic device on the chip and realizes with hardware.Each CPU can be one or more microprocessors, microcontroller, field programmable gate array or special IC (ASIC), and memory can comprise random-access memory (ram), dynamic random access memory (DRAM), static RAM (SRAM), flash memories and/or other stored digital medium, and also common the use is disposed in the circuit arrangement of one or more physical integrations or the realization of the circuit logic device on the chip.For this reason, memory can be believed to comprise: be physically located at the storage device of other position in the refrigerator 10, any buffer memory among at least one CPU for example; And anyly be used as the memory space of virtual memory, for example be stored in memory space on the mass storage device (such as hard disk drive, another computing system, network storage device (for example tape drive) or be connected to other network equipment of controller 50 by at least one network interface via at least one network).In a particular embodiment, computing system is computer, computer system, calculation element, server, disk array or programmable device such as multiple-access computer, single user computer, hand-held computing device, interconnection device (being included in the computer in the cluster configuration), device for mobile communication, video game machine (or other games systems) etc.Controller 50 comprises at least one serial line interface, so as with external device (ED) (such as air door driving mechanism 100) serial communication.Therefore, controller 50 plays the effect be used to the operation of controlling air door driving mechanism 100.
As previously described, air door driving mechanism 100 can be to be connected to the first and second air doors 66, one or more servomotors 102,104 of 68 by corresponding driving shaft 106,108.Yet in other embodiments, air door driving mechanism 100 also can comprise actuating mechanism and the device of other type.For example, air door driving mechanism 100 can be hydraulically powered, pneumatic or mechanically operated (such as by various types of motors).As shown in the embodiment that is demonstrated, air door driving mechanism 100 can be provided in open and the closed position between rotary air valve 66,68, but will be appreciated that air door driving mechanism 100 can alternatively slide or by irrotational mode mobile air door 66,68 otherwise.
Be schematically shown in the flow chart of a kind of exemplary Fig. 8 of operating in of refrigerator 10.In this respect, controller 50 can be used for the step that order refrigerator 10 is carried out method 200 as shown in this figure.For this reason, controller 50 need to determine whether defrost cycle in step 202.For example, in time-based defrost cycle, controller 50 determines whether passed through predetermined time in step 202 since nearest defrost cycle.If pass through predetermined time, controller 50 is in step 204 beginning defrost cycle so.If not yet pass through predetermined time, whether controller 50 continues to wait for and make regular check on to know and pass through predetermined time so.In one example, refrigerator 10 can defrost once in per 6 hours, and predetermined time will be 6 hours in this case.Alternatively, controller 50 can be used for carrying out the defrosting of adaptive capacity, and this has the defrosting of adaptive capacity to be spaced apart by change the time according to the operation characteristic of measuring between defrost cycle, and this will be described in further detail hereinafter.
Get back to Fig. 8, when the frost that needs defrost cycle with evaporimeter accumulation on pipe 112 removed, controller 50 stopped compressor 22 and evaporator fan 64 in step 204.This makes cold-producing medium stop to flow through cryogenic fluid loop 20 and evaporimeter 30 and makes air stop to flow through evaporimeter 30.Controller 50 cuts out the first and second air doors 66,68 in step 206 subsequently, so that evaporimeter section 72 is isolated with the section that is cooled 74 heat of cabinet 12.In the situation that the remainder heat of evaporimeter section 72 and cabinet 12 is isolated, controller 50 starts the operation of defroster heating 114 in step 208.Thereby defroster heating 114 make evaporimeter 30 and evaporimeter around pipe 112 warm melt frost and so that water droplet to drippage dish 116 in order to remove from evaporimeter 30.Refrigerator 10 in the running status of this point as shown in Figure 5.
Be connected to a sensor S of evaporimeter 30
3Can be configured to measure the temperature of evaporimeter 30.In step 210, controller 50 is determined sensor S
3Whether evaporimeter 30 temperature that read are in or are higher than the first object temperature of the freezing point (0 ° of C) of water.In one example, this first object temperature can be about 10 ° of C.If evaporimeter 30 is not to be in or to be higher than the first object temperature, controller 50 continues to make defroster heating 114 operations so, so that frost is removed around pipe 112 from evaporimeter.If evaporimeter 30 is in or is higher than the first object temperature, controller 50 cuts out defroster heating 114 and allows the time of one section setting that extra water is dropped onto on the drippage dish 116 around pipe 112 from evaporimeter in step 212 so.After this section " Drain time " had occured, controller 50 started compressor 22 in step 214, so that cold-producing medium flows through evaporimeter 30 again, thus cooling evaporator section 72.
In step 216, temperature sensor S
3Measure the temperature of evaporimeter 30, controller 50 determines whether this temperature is in or is lower than the second following target temperature of freezing point (0 ° of C) of water.In one example, this second target temperature can be about-25 ° of C.If evaporimeter 30 is not to be in or to be lower than the second target temperature, controller 50 continues to make compressor 214 operations so, with cooling evaporator 30.In case controller 50 definite evaporimeters 30 are in or are lower than the second target temperature, controller 50 is opened the first and second air doors 66,68 in step 218 so.Controller 50 also starts evaporator fan 64 in step 220, thereby impels air to flow through evaporimeter section 72 and evaporimeter 30 from the section of being cooled 74, is used for further cooling.This final step of defrost cycle or method 200 makes refrigerator 10 return running status shown in Figure 6, and this running status is normal refrigerating operaton state.As the result of heat shield 70, defrost cycle does not cause the significant temperature fluctuation in the inner space that is cooled 18 of cabinet 12, and therefore, it is favourable that refrigerator 10 is compared with the conventional refrigerator design.
Briefly describe as mentioned, in an alternative embodiment, defrost cycle can be the defrost cycle that adaptive capacity is arranged, and this defrost cycle optionally is unlocked in the step 202 of method 200.Have in the defrost cycle of adaptive capacity at this, the duration between the defrost cycle and the duration of defrost cycle are modified based on a plurality of operational factors that monitor by controller 50.For example, traditional time-based defrost cycle can make defroster heating 114 operations 10 minutes in per 6 hours.Compare, the actual temperature that has the defrost cycle of adaptive capacity to monitor to keep in the cabinet 12 and door are opened the total time that number of times and door are opened.These and other factors are considered, with how long determine before next defrost cycle is activated, should to have and in next defrost cycle defroster heating 114 how long should move.In this respect, if the door of cabinet 12 often be not opened in the process in 6 hours and evaporimeter 30 keeping being cooled preferred temperature in the section 74 aspect have no problem, so next defrost cycle can be delayed extra a few hours and/or the duration of being shortened.Therefore, have the defrost cycle of adaptive capacity to have higher energy efficiency because evaporimeter around pipe 112 only defrost cycle when being essential ability defrosted.In addition, there is the defrost cycle of adaptive capacity automatically to regulate refrigerator 10, thereby in various ambient conditions, correctly and efficiently moves.
Although the present invention is demonstrated by detailed description of illustrative embodiments, although and this embodiment quite explained, this is not restriction or by any mode claim is defined as this details.Additional benefit and improvement will be expected those of skill in the art.The present invention is not restricted to specific detail, representative device and method and the illustrative example that institute shows and illustrates aspect widely at it.Therefore, can in the situation of the spirit of the present general inventive concept that does not break away from the application or scope, make amendment to these details.
Claims (19)
1. refrigerator comprises:
Cabinet with the inner space that is cooled;
The cryogenic fluid loop that is used for circulating refrigerant, described cryogenic fluid loop comprises: compressor, condenser, expansion gear and evaporimeter, described evaporimeter are positioned at cabinet and comprise that evaporimeter is around managing, producing by evaporator fan and the defroster heating of evaporimeter around the air stream of pipe;
Heat shield, described heat shield separates the part of holding described evaporimeter of cabinet with the inner space that is cooled, described heat shield comprises at least one air door, and described at least one air door can be opened, and cycles through evaporimeter to allow air from the inner space that is cooled; And
Controller, described controller can order described refrigerator to carry out following steps when pipe needs defrosting at described evaporimeter:
Stop the operation of described compressor and described evaporator fan;
Close described at least one air door, so that described evaporimeter and the described inner space heat that is cooled are isolated; And
Start the operation of described defroster heating,
Wherein, the described inner space that is cooled keeps in the running of described defroster heating and the isolation of described evaporimeter heat.
2. refrigerator as claimed in claim 1 is characterized in that, described refrigerator also comprises the temperature sensor be used to the temperature of surveying described evaporimeter, and described controller can also order described refrigerator to carry out following steps in the defrost process of described evaporimeter:
When described temperature sensor detects described evaporimeter and reached the first object temperature of the freezing point that is higher than water, stop the operation of described defroster heating and allow any remaining water to drip around pipe from described evaporimeter;
After the pipe drippage, start described compressor from described evaporimeter at described remaining water; And
When described temperature sensor detects described evaporimeter and reached the second target temperature of the freezing point that is lower than water, open described at least one air door and start the operation of described evaporator fan.
3. refrigerator as claimed in claim 2 is characterized in that, described first object temperature is about 10 ° of C, and described the second target temperature is about-25 ° of C.
4. such as arbitrary described refrigerator in the aforementioned claim, it is characterized in that, described at least one air door comprises the first air door and the second air door, described the first air door allows air to flow to the described evaporimeter from the described inner space that is cooled at open position, and described the second air door allows air to flow to from evaporimeter the described inner space that is cooled at open position.
5. such as arbitrary described refrigerator in the aforementioned claim, it is characterized in that, described heat shield also comprises a plurality of thermal insulation boards, and described a plurality of thermal insulation boards jointly are separated into described cabinet evaporator room and the described inner space that is cooled when described at least one air door is closed.
6. refrigerator as claimed in claim 5 is characterized in that, each thermal insulation board is vacuum insulation panel.
7. such as arbitrary described refrigerator in the aforementioned claim, it is characterized in that described expansion gear comprises at least one in capillary or the valve.
8. such as arbitrary described refrigerator in the aforementioned claim, it is characterized in that described cryogenic fluid loop also comprises the accumulation device that operationally is connected to described evaporimeter and described compressor.
9. such as arbitrary described refrigerator in the aforementioned claim, it is characterized in that described cryogenic fluid loop also comprises the filter/drying device that operationally is connected to described condenser and described expansion gear.
10. such as arbitrary described refrigerator in the aforementioned claim, it is characterized in that described controller can be revised the duration between the defrost cycle and the operation duration that is modified in defroster heating described in the defrost cycle process based at least one measurable operational factor.
11. a method that operates refrigerator, described refrigerator comprises: the cabinet with the inner space that is cooled; And cryogenic fluid loop, described cryogenic fluid loop comprises compressor, condenser and evaporimeter, described evaporimeter is positioned at cabinet and has evaporator fan and defroster heating, described refrigerator also comprises heat shield, described heat shield has at least one air door, and be configured to the inner space that is cooled of described evaporimeter and described cabinet is separated, described method comprises:
Stop the operation of described compressor and described evaporator fan;
Close described at least one air door, so that described evaporimeter and the described inner space heat that is cooled are isolated; And
Start the operation of described defroster heating,
Wherein, the described inner space that is cooled keeps in the running of described defroster heating and the isolation of described evaporimeter heat.
12. method as claimed in claim 11 is characterized in that, described method also comprises:
When described evaporimeter has reached the first object temperature of the freezing point that is higher than water, stop the operation of described defroster heating and allow any remaining water to drip around pipe from described evaporimeter;
After the pipe drippage, start described compressor from described evaporimeter at described remaining water; And
When described evaporimeter has reached the second target temperature of the freezing point that is lower than water, open described at least one air door and start the operation of described evaporator fan.
13. method as claimed in claim 12 is characterized in that, described first object temperature is about 10 ° of C, and described the second target temperature is about-25 ° of C.
14. such as arbitrary described method in the claim 11 to 13, it is characterized in that, described at least one air door comprises the first air door and the second air door, described the first air door allows air to flow to the described evaporimeter from the described inner space that is cooled at open position, described the second air door allows air to flow to from evaporimeter the described inner space that is cooled at open position, and when the operation of described evaporator fan was stopped, described the first and second air doors were closed simultaneously by described refrigerator.
15. a method that operates refrigerator, described refrigerator comprises: the cabinet with the inner space that is cooled; And cryogenic fluid loop, described cryogenic fluid loop comprises compressor, condenser and evaporimeter, described evaporimeter is positioned at cabinet and has evaporator fan and defroster heating, described refrigerator also comprises heat shield, described heat shield has at least one air door, and be configured to the inner space that is cooled of described evaporimeter and described cabinet is separated, described method comprises:
When being closed, described at least one air door starts the operation of described defroster heating; And
When described evaporimeter has reached the first object temperature of the freezing point that is higher than water, stop the operation of defroster heating and start the operation of described compressor; And
When described evaporimeter has reached the second target temperature of the freezing point that is lower than water, open described at least one air door and start the operation of described evaporator fan.
16. method as claimed in claim 15 is characterized in that, described first object temperature is about 10 ° of C, and described the second target temperature is about-25 ° of C.
17. such as arbitrary described method in the claim 11 to 13,15 and 16, it is characterized in that, described at least one air door comprises the first air door and the second air door, described the first air door allows air to flow to the described evaporimeter from the described inner space that is cooled at open position, described the second air door allows air to flow to from evaporimeter the described inner space that is cooled at open position, and when the operation of described evaporator fan was activated, described the first and second air doors were opened simultaneously by described refrigerator.
18., it is characterized in that described refrigerator is arbitrary described refrigerator in the claim 1 to 10 such as arbitrary described method in the claim 11 to 17.
19. such as arbitrary described refrigerator in the claim 1 to 10, it is characterized in that, described refrigerator can be according to claim 11 in 17 arbitrary described method operate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161548795P | 2011-10-19 | 2011-10-19 | |
| US61/548,795 | 2011-10-19 |
Publications (1)
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| CN103062970A true CN103062970A (en) | 2013-04-24 |
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ID=47324694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104009557A Pending CN103062970A (en) | 2011-10-19 | 2012-10-19 | High performance refrigerator having insulated evaporator cover |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20130098074A1 (en) |
| CN (1) | CN103062970A (en) |
| DE (1) | DE102012020112A1 (en) |
| GB (1) | GB2496948B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887287A (en) * | 2018-09-10 | 2020-03-17 | 沈阳海尔电冰箱有限公司 | Heat exchanger assembly of refrigerator and refrigerator |
| CN112334044A (en) * | 2018-04-12 | 2021-02-05 | 开利公司 | Refrigerated sales cabinet |
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| US9310121B2 (en) | 2011-10-19 | 2016-04-12 | Thermo Fisher Scientific (Asheville) Llc | High performance refrigerator having sacrificial evaporator |
| US9285153B2 (en) | 2011-10-19 | 2016-03-15 | Thermo Fisher Scientific (Asheville) Llc | High performance refrigerator having passive sublimation defrost of evaporator |
| KR102236751B1 (en) * | 2014-08-18 | 2021-04-06 | 삼성전자주식회사 | Refrigerator |
| US20170227276A1 (en) | 2016-02-04 | 2017-08-10 | Robertshaw Controls Company | Rotary damper |
| KR102397785B1 (en) | 2016-11-23 | 2022-05-12 | 트루 매뉴팩쳐링 코., 인크. | Hygienic Evaporator Assembly |
| US20220099356A1 (en) * | 2020-09-28 | 2022-03-31 | Illinois Tool Works Inc. | Refrigerated device with enhanced defrost and condensate pan heater control |
| CN114812090A (en) * | 2022-05-23 | 2022-07-29 | 济南宇翔制冷设备有限公司 | Automatic maintenance system for refrigerator |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB2496948B (en) | 2014-10-15 |
| US20130098074A1 (en) | 2013-04-25 |
| GB2496948A (en) | 2013-05-29 |
| DE102012020112A1 (en) | 2013-04-25 |
| GB201218351D0 (en) | 2012-11-28 |
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Application publication date: 20130424 |